It would be useful if we had the ability to use wildcards/regexes in SANITY_TESTED_DISTROS entries to avoid having to bump the version on minor distro releases.
Olof Johansson has added the support for this and it has been merged to master for 1.6: http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=b1a75ba1d828b6f5e5b863937a0bb4683f352817 We just need to decide separately if it's something we want to now make use of in Poky's SANITY_TESTED_DISTROS value.
In poky.conf in master we are now making use of the wildcard support as of this commit: http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=4fa0f0c8bd41763d5b4c80e05373754a02976afc I think we can therefore now mark this one as resolved.